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The range of components techlogy is both wide and diverse, but some common understanding is emerging through the ideas of model-based development. These include the tions of interfaces, contracts, services, connectors and architectures. Key issues in the application of the techlogy are becoming clearer, including the consistent integration of different views of a component, component composition, component coordination and transformation for platforms. However, we still kw little about theories that support analysis and synthesis of component-based systems. The distinct feature of this volume is its focus on mathematical models that identify the core concepts as first class modeling elements, and its providing of techniques for integrating and relating them. The volume contains eleven chapters by well-established researchers writing from different perspectives. Each chapter gives explicit definitions of components in terms of a set of key aspects and addresses some of the problems of integration and analysis of various views: component specification, component composition, component coordination, refinement and substitution, and techniques for solving problems. The concepts and techniques are motivated and explained with the help of examples and case studies.